Abstract:
A pipe testing apparatus includes a mandrel adapted for insertion within the pipe and two sealing devices connected to the mandrel and adapted to seal opposite ends of the pipe to create an annular space between the mandrel, the pipe, and the sealing devices. The apparatus further includes one or more ports for filling the annular space with a pressurized fluid and a pressure gauge for monitoring the pressure within the annular space. At least one of the sealing devices includes a combination of a sealing ring and a force applying ring, which forces the sealing ring to bear against one end of the pipe to from a seal. The mandrel is provided with stops for preventing the at least one sealing device from moving axially away from the pipe.
Abstract:
A strain testing apparatus which places tensile forces on a sheet, a film, or the like samples in at least two axes and generally in a radial direction. The multi-axial strain testing apparatus can advantageously be employed to test crack growth propagation and flex fatigue in rubber polymer and elastomer samples.
Abstract:
A sample of material is tested by rupture with an impact member, relative movement of the sample and member being maintained at a substantially constant velocity along a straight line before and after impact and being derived from angular movement of a cam driven by a flywheel. The apparatus is capable of automatic operation (including automatic result recording) with increased operator safety, gives results of good reproducibility, and is quieter in use than previously proposed apparatus.
Abstract:
The present invention relates to a wheel clamping system for reversibly clamping a motor vehicle wheel with a rim onto a wheel servicing machine, wherein the wheel clamping system comprises at least one force measuring device for measuring the value of a clamping force exerted by the wheel clamping system on a rim of a motor vehicle wheel held on the main shaft.
Abstract:
An apparatus for testing the break-through strength of a tissue product is disclosed. The apparatus comprises a dose addition assembly having an opening and a sample holder. The sample holder comprises a lower platen and an upper platen disposed in a fact to face relationship and each having coextensive openings disposed therein. The opening of the dose addition assembly is disposed proximate to one of the openings disposed within the upper and lower platens. A substance is disposed within the dose addition assembly and is capable of being expectorated from the opening of the dose addition assembly through one of the openings disposed within the upper and lower platens onto a tissue product disposed between the upper and lower platens and within the openings disposed within the upper and lower platens.
Abstract:
A pipe testing apparatus includes a mandrel adapted for insertion within the pipe and two sealing devices connected to the mandrel and adapted to seal opposite ends of the pipe to create an annular space between the mandrel, the pipe, and the sealing devices. The apparatus further includes one or more ports for filling the annular space with a pressurized fluid and a pressure gauge for monitoring the pressure within the annular space. At least one of the sealing devices includes a combination of a sealing ring and a force applying ring) which forces the sealing ring to bear against one end of the pipe to from a seal. The mandrel is provided with stops for preventing the at least one sealing device from moving axially away from the pipe.
Abstract:
A material test specimen design is taught for the determination of criticaltrain and stress states for multiaxial fracture. The objective of the specimen is to increase the amount of data obtained per specimen while retaining simplicity in testing procedure by using standard tension testing machines to generate the primary deformation of the specimen. The specimen, in conjunction with analytical or computational simulation, uses nonuniform deformation fields produced by secondary and tertiary strain concentrations to generate and track these multiaxial strain states to fracture. Typically, the primary deformation is uniaxial tension of a panel, the secondary strain concentration is a circular hole in the panel and the tertiary strain concentrations are areas of reduced thickness within the deformation field of the circular hole. Multiaxial strain ratios from -0.50 to -0.10 and control over fracture initiation sites may be generated by a test specimen design of the type taught by this invention.